Speed indicator and recorder.



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1131; A1 5 {lbw 1mg j I 1 r I F. P. UEHLING. 1 SPEED INDICATOR AND RECORDER.

APPLIOATION FILED DEG.13,1'906.

904,660. Patented Nov. 24, 1908.

a detail View she-win FRlTZ F. UEHLING, PASSAIO, NEW JERSEY.

SEEED ZNDI CATOR AND RECSRDER.

in. screen;

Specification of Letters Yatent.

Patented Nov. 24, 1908,

Application filed. December 13, 1906. Serial N 0. $17,651.

in it may concern:

Known that I FRITZ FREDERICK Unniwc, a citizen of the United States of Am. 5 and. resident of the city of Passaic, noun y 0., Passaic, and State'of New Jersey, have invented certain new and useful improvements in Speed Indicators and Re corders, of which the following is a specification. s g

- My iivention relates to speed indicators and recorders and it is especially adapted to.

be used in connection with wheeled vehicles.

The object of my invention is to produce a speed indicator and recorder of this class which shall indicate at any instant the actuai speed of a shaft and which when appropriately connected with a wheeled vehicle shall indicate the speed at which the vehicle travels, th distance traveled, and record continuously the speed and distance.

My invention, consists in the novel construction and arrangement herein described and particularly pointed out in. the claims.

in the drawings accompanying and forming a part of this specification Figure 1 is a front View partially in section, Fig. 2 is a section saline-a a cf Fig. 1., and Fig. 3 is the connection between the chart mechanism and the main shaft.

The reference characters are used in the same sense in the drawings and specification.

Numeral 1 represents a' case in which is mounted the main shaft 2 which extends outside of the case, having a squared end 3 adapted to be connected in any convenient manner with the shaft or wheel whose speed is to be indicated and recorded. Formed i n upon the scarf IS a long worm 4:, the purpose and function of which will be hereinafter described.

Mounted upon guide rods 55 which are parallel with the shaft 2 is a sliding frame 6. This frame carries the worm wheel 7 whichaneshcs with the worm 4 and a train of gears 8 9 10, 11, and 12. The shaft 13 on which the gear is mounted. carries a fan or vane 1 1. A spring 15 is connected with the sliding frame 6 and an adjusting screw 16 and tends to pull the sliding frame in a direction opposite to that which would be given to it by the worm 1 when there is resistance to the turning of the worm wheel7. The shaft 2 turns in the direction of the i aahen the frame 6 is stationary t 2 is revolved the fan 14 will have a certain definite velocity ratio relative to the shaft 2. The revolution of the fan 14, however, produces a certain resistance between the teeth of the worm wheel 7 and the worm 4 and this resistance will vary with the speed of revolution and willcause the sliding frame to move, tov the right as seen in Fi 1, until it is balanced by the re.- sistance of the spring 15. Whenever the frame is at rest there will be a certain velocity ratio betweenthe fan 14 and the shaft 2 ance offered to the motion of the fan and it will be normal when the resistance of'the spring just counterbalances that ofthe fan.

Attached to the sliding frame 6 is an indicating arm 17 point 18.

The shaft 2 is provided at its end with a worm 20, engaging the worm wheel 21 on the shaft 22. At the other end of the shaft 22 is a worm 23 engaging the worm wheel 24, on the shaft 25. A roller 26 is mounted on the shaft 25 and a gear 27 engaging the which carries a marking gear 28 on the shaft 29. The shaft 29 is mounted in an adjustable frame 30 and it also carries the roller 31 which is adapted to press upon the roller 26 by means of the adjusting screw A roll of paper forming the chart33 is mounted upon the shaft 34 at the rear and the shaft 35 at the front. The roll 35 is adapted to be driven in any suitable manner which will take up the-slack chart as it is fed through by rolls 31 and 26. By means of these connections it will be seen that the chart is fed underneath the marking point 18 at a rate proportional to the speed of rotation of the shaft 2 and that the position of the marking point 18 will be controlled by the speed of the shaft -2 through the mechanism hereinbefore explained. I

Having thus described my -invention what I claim is:

1. In a speed recording device the combination with-a rotatable shaft of a movable,

2. In a speed recording device the combination with a case of a frame {slidably mounted ins-aid case, a rotatable fan mounted in said frame, a rotatable shaft mounted in said case and connections between said fan and said shaft such that the movement of said frame relative to said shaft will cause a variation in the velocity ratio of said shaft and said fan. I

8. In a speed recording device the combination with a case of a frame slidably mounted in said case, a rotatable fan mounted in said frame, a rotatable shaft mounted in said case and connections between said fan and said shaft such that the movement of said frame relative to said shaft will cause a variation in the velocity ratio of said shaft and said fan and means for op posing the movement of said frame with a resistance varying with its position.

l. In a speed recorder the combination aoaeeo with, a case of a shaft mounted in said case having a wormformed thereon, a movable frame mounted in said case, a rotatable fan mounted in said frame 1n geared connection with said Worm and a spring connecting said case and said movable frame.

5. In a speed recorder the combination witha case of a shaft mounted in said case having a worm formed thereon, a movable frame mounted in said case, a rotatable fan mounted in said frame in geared connection with said Worm and a spring connecting said case and'said movable frame and an indicator carried by said frame.

6. In a speed recorder the combination with a case of a shaft mounted in said case having a Worm formed thereon, a movable frame mounted in said case, a rotatable fan mounted in said frame in geared connection with said Worm and a spring connecting said case and sald movable frame, a marking point carried by name to this specification in the presence of two subscribing Witnesses. F. F. UEHLING; f Witnesses:

C. A. COULTEN, ERNEST MILLER.-

said frame and a charts; mechanlsm operatively connected with said? shaft;

. 5 5 In testimony whereof, I have signed my v 

